package com.mmall.concurrency.example.commonUnsafes;

import com.mmall.concurrency.annotions.ThreadSafes;
import lombok.extern.slf4j.Slf4j;
import org.springframework.format.annotation.DateTimeFormat;

import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormatter;


import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;

/**
 * <p>Descriptions...
 *
 * @author Diamon.Cheng
 * @date 2019/12/8.
 */
@Slf4j
@ThreadSafes
public class DateFormatExample_3 {
    // 请求总数
    public static int clientTotal = 5000;
    
    // 同时并发执行的线程数
    public static int threadTotal = 200;
    
    private static DateTimeFormatter dateTimeFormatter = org.joda.time.format.DateTimeFormat.forPattern("yyyyMMdd");
    
    public static void main(String[] args) throws Exception {
        ExecutorService executorService = Executors.newCachedThreadPool();
        final Semaphore semaphore = new Semaphore(threadTotal);
        final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);
        for (int i = 0; i < clientTotal; i++) {
            final int count = i;
            executorService.execute(() -> {
                try {
                    semaphore.acquire();
                    update(count);
                    semaphore.release();
                } catch (Exception e) {
                    log.error("exception", e);
                }
                countDownLatch.countDown();
            });
        }
        countDownLatch.await();
        executorService.shutdown();
    }
    
    private static void update(int i) {
        log.info("{}, {}", i, DateTime.parse("20180208", dateTimeFormatter).toDate());
    }

}
